5m-3n=19;m-6n=-7 simultaneously equation
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Answered by
35
5m-3n = 19
m-6n = -7
multiply equation 2 with 5
5m-3n =19
5m-30n =-35
subtract 2 from 1
27n =54
n =2
substituting in n=2 in 1
5m - 6 =19
5m =25
m =5
m-6n = -7
multiply equation 2 with 5
5m-3n =19
5m-30n =-35
subtract 2 from 1
27n =54
n =2
substituting in n=2 in 1
5m - 6 =19
5m =25
m =5
Answered by
2
Answer:
5m – 3n = 19 .....(I)
m – 6n = –7 .....(II)
Multiplying (I) with 2 we get
10m – 6n = 38 .....(III)
m – 6n = –7 .....(IV)
Subtracting (IV) from (III) we get
10m-m-6n-(-6n)=38-(-7)
⇒9m=45
⇒m=45/9
=5
Putting the value of m = 5 in (II) we get
5-6n=-7⇒-6n=-7-5
⇒-6n=-12
⇒n=-12/-6
=2
Thus, (m, n) = (5, 2).
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